That depends on what country you're asking about.
To answer the question: magnesium, vitamin E, vitamin C, Calcium, fiber, vitamin A, potassium, iodine, vitamin D, and vitamin B12.
The most common cause of anemia in adults is iron deficiency.
Iron deficiency anemia
Iron deficiency is the most common nutrient deficiency worldwide, affecting about a quarter of the global population. Iron is essential for producing hemoglobin, which carries oxygen in red blood cells. Deficiency can lead to anemia and other health complications.
Alcoholism is the most common cause of thiamine deficiency in the U.S. due to poor dietary intake, alcohol-related malabsorption, and increased thiamine excretion. Thiamine deficiency can lead to serious neurological complications like Wernicke-Korsakoff syndrome.
selective immunoglobulin A deficiency disease.
The most common mineral deficiency in the elderly is calcium deficiency, which can lead to osteoporosis and increased risk of fractures. It is important for elderly individuals to consume an adequate amount of calcium through diet or supplements to support bone health.
iron deficiency anemia is most common in women occur because of menstrual blood loss
aids(acquired immuno deficiency syndrom)
Iron
The most common cause of iron deficiency anemia (IDA) is a lack of iron in the body, often due to inadequate dietary intake or chronic blood loss.
There are many Vitamin D deficiency symptoms and here are the most common ones:ricketsosteoporosisobesityfatiguechronic backachecancersDiabetesHeart diseaseshyperparathyroidismdepression
In developing countries located in tropical climates, the most common cause of iron deficiency anemia is infestation with hookworm.